US4339921A - Brake booster for an automotive vehicle - Google Patents

Brake booster for an automotive vehicle Download PDF

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Publication number
US4339921A
US4339921A US06/049,706 US4970679A US4339921A US 4339921 A US4339921 A US 4339921A US 4970679 A US4970679 A US 4970679A US 4339921 A US4339921 A US 4339921A
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US
United States
Prior art keywords
casing
bolts
vacuum
end wall
brake booster
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/049,706
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English (en)
Inventor
Johannes Schanz
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ITT Inc
Original Assignee
ITT Industries Inc
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Publication date
Application filed by ITT Industries Inc filed Critical ITT Industries Inc
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Publication of US4339921A publication Critical patent/US4339921A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
    • B60T13/5675—Supportstruts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/563—Vacuum systems indirect, i.e. vacuum booster units with multiple booster units, e.g. tandem booster units

Definitions

  • the present invention relates to a brake booster and more particularly to a brake booster for an automotive vehicle operated by the differential of pressure between a vacuum and atmospheric pressure.
  • a brake booster for an automotive vehicle which is operated by the differential of pressure between a vacuum and atmospheric pressure.
  • This brake booster comprises a vacuum casing, a movable wall disposed therein and a control valve, the movable wall including a diaphragm dividing the vacuum casing into a vacuum chamber of constant vacuum and a working chamber of different pressures and acting on a push rod guided in the axial direction of the brake booster.
  • the casing end wall includes several bolts serving to secure the brake booster to the splash wall of an automotive vehicle.
  • the master cylinder is mounted on the other side of the vacuum casing where the end of the push rod extends out of the casing end wall. As a rule, this mounting is likewise by means of bolts to bolt the master-cylinder flange to this casing end wall.
  • the vacuum casing is conventionally of sheet steel.
  • pneumatic forces act on the vacuum casing. These forces, which somewhat compress the vacuum casing, have to be taken up by the components of the vacuum casing.
  • To limit the amount of deformation of the vacuum casing it is necessary to provide the casing components with an appropriate strength.
  • These designs are, however, not economical because of the resultant increase in the material costs in addition to being of a high weight.
  • such an arrangement is unable to comply with the vehicle manufacturers' demands for the lowest possible weight of brake systems without the safety and operability of the brake booster being impaired.
  • the arrangement disclosed in the present invention is of particular importance for a mechanically controlled brake booster utilizing the pressure differential between a vacuum and atmospheric pressure and comprising a vacuum casing having at least one movable wall disposed therein, the movable wall dividing the vacuum casing into a vacuum chamber and a working chamber and acting upon a push rod guided in the axial direction of the brake booster, with means for fastening the brake booster to a splash wall being provided on the vacuum casing on a casing end wall where a rod for the introduction of force extends into the vacuum casing, and further means for fastening a master cylinder being provided on the opposite casing end wall.
  • the vacuum casing of such a brake booster as it is described, for example, in the above cited German Patent DE-AS 2,345,314, is subjected to high forces, and this is the main problem as pointed out below.
  • the reaction force results in an elongation of the vacuum casing in an axial direction and, consequently, in a displacement of the master cylinder which adds to the lost travel of the brake pedal.
  • the elongation of the vacuum casing is increased by a multiple and transmitted to the brake pedal.
  • the elongation is still further increased by the pneumatic forces acting on the vacuum casing. Their effects have to be taken into consideration to a still greater extent if the casing components are of reduced wall thickness.
  • an object of the present invention to provide a brake booster of the type referred to hereinabove, which results in a reduction of the material costs and the weight.
  • a feature of the present invention is the provision of a brake booster for an automotive vehicle utilizing a pressure differential between a vacuum and atmospheric pressure
  • a vacuum casing having a control valve actuated by a brake pedal secured to one end wall thereof, a master cylinder push rod guided axially of the casing extending through the other end wall thereof and at least one movable wall disposed therein dividing the casing into a vacuum chamber and a working chamber and acting on the push rod; at least one member extending through the casing and the movable wall parallel to the push rod and connected to the one end wall and the other end wall; and at least one sealing means disposed in the movable wall and embracing the member to prevent leaks between the vacuum and working chambers and to enable the movable wall to slide on the member.
  • the essential advantages of the brake booster of the present invention are that the weight of the brake booster is reduced by the elimination of reinforcement of the casing and the use of thinner-walled components and that it is possible to manufacture the vacuum casing using lower-weight and less costly materials.
  • the bolts are bolted to at least one of the casing end walls.
  • This arrangement permits adjustment of the length of the vacuum casing within the casing elasticity and thus a reduction of the clearance between the brake pedal and the master cylinder.
  • the casing can be preloaded such that the bolts are practically relieved of the load in the presence of vacuum in the vacuum casing.
  • their ends are so designed that they serve for fastening the brake booster to the splash wall and at the same time for fastening a master cylinder to the brake booster. This eliminates the need to provide the fastening screws herebefore used.
  • the bolts extend through a hollow screw on the casing end wall of the brake booster close to the master cylinder.
  • This arrangement permits assembly to the brake booster independently of the mounting of the master cylinder and, in the event of a replacement of the master cylinder during repair work, for example, enables the brake booster to remain in its fully assembled state and maintain its adjusted length, so that it is not necessary to provide additional means connecting the casing components.
  • FIG. 1 is a longitudinal cross-sectional view through a brake booster having a master cylinder secured thereto in accordance with the principles of the present invention
  • FIG. 2 is a longitudinal cross-sectional view through a tandem brake booster having a master cylinder secured thereto in accordance with the principles of the present invention.
  • FIG. 1 shows a brake booster 1 comprising a two-part vacuum casing 2, a push rod 3 guided therein coaxially of casing 2 and having a movable wall 4 mounted thereon, and a control valve 5 to control the differential of pressure.
  • Vacuum casing 2 comprises a casing shell 6 on the side close to control valve 5 and a casing shell 7 on the side close to a master cylinder, shells 6 and 7 being connected on their outer periphery with the outer edge of a rolling diaphragm 8 being clenched therebetween.
  • the inner edge of rolling diaphragm 8 is secured to movable wall 4, thereby forming a vacuum chamber 9 and a working chamber 10 in vacuum casing 2.
  • Two bolts 11 and 12 extend through vacuum casing 2 in parallel with push rod 3, bolts 11 and 12 penetrating movable wall 4 which is provided with slide seals 13 and 14 surrounding bolts 11 and 12 to prevent leakage between vacuum chamber 9 and working chamber 10.
  • Bolts 11 and 12 are of such length that their respective ends 15, 15' and 16, 16' extend out of vacuum casing 2. Ends 15 and 16 on the side close to control valve 5 are provided with respective rings 17 and 18 secured to bolts 11 and 12 as well as with respective threads extending from rings 17 and 18 up to the end of bolts 11 and 12. Rings 17 and 18 are situated on the inner side of casing shell 6 with nuts 19 and 20 being screwed onto ends 15 and 16 from the outside. In assembling the arrangement, rings 17 and 18 are sealed relative to casing shell 6, and ring seals may be used for that purpose, for example.
  • hollow screws 21 and 22 are fitted, for example by means of riveting or welding, and ends 15' and 16' of bolts 11 and 12 extend therethrough.
  • bolts 11 and 12 are suitably sealed relative to hollow screws 21 and 22, and where applicable, hollow screws 21 and 22 are sealed relative to casing shell 7.
  • Ends 15' and 16' are of a diameter smaller than the remaining part of bolts 11 and 12 and are provided with a thread having a respective nut 23 and 24 screwed thereon. Vacuum casing 2 is thereby clamped by means of bolts 11 and 12.
  • the diagonal length of nuts 23 and 24 is not greater than the diameter of hollow screws 21 and 22.
  • a flange 25 of a master cylinder 26 is provided with bores and arranged at casing shell 7 with hollow screws 21 and 22 extending out of the bores of flange 25 and master cylinder 26 secured by means of the nuts 27 and 28 screwed onto the free ends of hollow screws 21 and 22.
  • FIG. 2 shows a brake booster 1 in tandem construction. Parts identical to those of FIG. 1 have been assigned reference numerals as employed in FIG. 1.
  • vacuum casing 2 including casing shell 6 on the side close to the control valve and casing shell 7 on the side close to master cylinder 26, is a rigid partition wall 29 subdividing vacuum casing 2 into two compartments. Situated in a first of these two compartments is a movable wall 4 with a rolling diaphragm 8 and in a second of these two compartments is a movable wall 4' with a rolling diaphragm 8' to form in each of the two compartments a vacuum chamber 9 and 9' and a working chamber 10 and 10'.
  • Vacuum casing 2 houses two bolts 11 and 12 parallel with push rod 3 and extending through suitable openings in rigid wall 29 and movable walls 4 and 4'.
  • ring seals 30 and 31 which embrace bolts 11 and 12.
  • slide seals 13, 13' and 14, 14' are slide seals 13, 13' and 14, 14' embracing bolts 11 and 12.
  • Ends 15, 15' and 16, 16' project out of vacuum casing 2.
  • Ends 15, 16 close to the control valve each have a respective ring 17 and 18 fitted to bolts 11 and 12 as well as a thread extending from rings 17 and 18 up to the end of bolts 11 and 12.
  • Rings 17 and 18 abut against the inner wall of casing shell 6 with a respective ring seal 32 and 33 being interposed therebetween, and nuts 19 and 20 are screwed onto ends 15 and 16 from the outside. Ends 15 and 16 on the side close to the control valve are of such a predetermined length that they serve to secure brake booster 1 to a vehicle splash wall not shown in the drawing.
  • Ends 15' and 16' of bolts 11 and 12 are of the same construction as ends 15 and 16 described in the foregoing.
  • Rings 17' and 18' are located on the inner wall of casing shell 7 with ring seals 32' and 33' being interposed between rings 17' and 18' and casing shell 7.
  • a flange 25 of master cylinder 26 is provided with bores and arranged at casing shell 7 with ends 15' and 16' extending out of the bores of flange 25.
  • Rings 17, 17' and 18, 18' do not form part of bolts 11 and 12 but are separate components which at least on the one side are fitted to the bolts after bolts 11 and 12 have been passed through seals 13', 30, 13 and 14', 31, 14. Rings 17, 17' 18 and 18' may be provided with respective collar directed against the casing end wall, which collars, in the assembled state of brake booster 1, abut against casing shells 6 and 7.
  • Securing bolts 11 and 12 by means of hollow screws 21 and 22 (FIG. 1) as disclosed in the present invention makes it further possible to compensate for the deviations, due to manufacturing tolerance, in the distance between the point of push rod 3 and the abutment surface for master-cylinder flange 25 by variation of the axial length of vacuum casing 2 which is obtained by turning nuts 23 and 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
US06/049,706 1978-07-10 1979-06-18 Brake booster for an automotive vehicle Expired - Lifetime US4339921A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2830262 1978-07-10
DE19782830262 DE2830262A1 (de) 1978-07-10 1978-07-10 Bremskraftverstaerker fuer ein kraftfahrzeug

Publications (1)

Publication Number Publication Date
US4339921A true US4339921A (en) 1982-07-20

Family

ID=6043989

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/049,706 Expired - Lifetime US4339921A (en) 1978-07-10 1979-06-18 Brake booster for an automotive vehicle

Country Status (10)

Country Link
US (1) US4339921A (enrdf_load_stackoverflow)
JP (1) JPS6026746B2 (enrdf_load_stackoverflow)
BR (1) BR7904297A (enrdf_load_stackoverflow)
DE (1) DE2830262A1 (enrdf_load_stackoverflow)
ES (1) ES244436Y (enrdf_load_stackoverflow)
FR (1) FR2430879A1 (enrdf_load_stackoverflow)
GB (1) GB2025549B (enrdf_load_stackoverflow)
IT (1) IT1165147B (enrdf_load_stackoverflow)
SE (1) SE442106B (enrdf_load_stackoverflow)
ZA (1) ZA793157B (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416191A (en) * 1980-09-19 1983-11-22 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4428274A (en) 1980-09-10 1984-01-31 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4433614A (en) 1980-09-18 1984-02-28 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4467705A (en) * 1981-02-10 1984-08-28 Feramatic Ag Fluid-actuated drive
US4522031A (en) * 1981-06-17 1985-06-11 The Bendix Corporation Fluid pressurizing device
US4557179A (en) * 1980-09-25 1985-12-10 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4594854A (en) * 1980-12-06 1986-06-17 Nissin Kogyo Kabushiki Kaisha Assembly of vacuum booster and master cylinder
US4630525A (en) * 1984-03-29 1986-12-23 Aisin Seiki Kabushiki Kaisha Vacuum booster assembly
US5052274A (en) * 1987-12-01 1991-10-01 Bendix France Tandem brake booster with return spring arrangement for rear piston chamber
US5072996A (en) * 1988-08-19 1991-12-17 Lucas Industries Public Limited Company Brake actuating assembly for motor vehicles
US5570622A (en) * 1995-06-08 1996-11-05 General Motors Corporation Power booster with guided power piston
US5878650A (en) * 1997-05-21 1999-03-09 General Motors Corporation Power booster sealing mechanism
DE19832357A1 (de) * 1998-07-20 2000-01-27 Continental Teves Ag & Co Ohg Pneumatischer Kraftverstärker in Tandembauweise
US6189437B1 (en) * 1999-08-30 2001-02-20 Robert Bosch Corporation Brake booster having means for mounting on a wall
JP3215704B2 (ja) 1992-01-31 2001-10-09 ルーカス・インダストリーズ・パブリック・リミテッド・カンパニー モータビークルブレーキ用アクチュエータユニット
US7040217B1 (en) * 2004-11-16 2006-05-09 Robert Bosch Gmbh Tie rod for a brake booster
US20070089601A1 (en) * 2005-10-25 2007-04-26 Sexton Roger S Brake booster with deformationally sealed passage and method of manufacture
US20070137473A1 (en) * 2003-08-20 2007-06-21 Continental Teves Ag & Co. Ohg Actuation unit for a hydraulic vehicle brake
US20190047531A1 (en) * 2015-09-14 2019-02-14 Robert Bosch Gmbh Electromechanical brake booster and braking system
CN110366511A (zh) * 2017-03-06 2019-10-22 罗伯特·博世有限公司 机电的制动力放大器以及用于机电的制动力放大器的制造方法

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908515A1 (de) * 1979-03-05 1980-10-09 Teves Gmbh Alfred Bremskraftverstaerker fuer ein kraftfahrzeug
DE2918914A1 (de) * 1979-05-10 1980-12-11 Teves Gmbh Alfred Bremskraftverstaerker
FR2476574A1 (fr) * 1980-02-22 1981-08-28 Dba Servomoteur d'assistance au freinage a structure allegee
JPS56167548A (en) * 1980-05-28 1981-12-23 Nissin Kogyo Kk Negative pressure type booster
JPS5758548A (en) * 1980-09-26 1982-04-08 Nissin Kogyo Kk Pneumatic pressure type doubler device
DE3041883A1 (de) * 1980-11-06 1982-06-09 Alfred Teves Gmbh, 6000 Frankfurt Unterdruckgehaeuse fuer einen bremskrftverstaerker
JPS6228533Y2 (enrdf_load_stackoverflow) * 1980-11-12 1987-07-22
DE3203495C2 (de) * 1982-02-03 1986-04-10 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Vorrichtung zur gemeinsamen Befestigung eines Bremskraftverstärkers und eines Hauptbremszylinders am Kraftfahrzeug
DE3824458A1 (de) * 1988-07-19 1990-01-25 Teves Gmbh Alfred Gekruemmter tandem-hauptzylinder
DE4427907B4 (de) * 1994-08-06 2008-04-30 Continental Teves Ag & Co. Ohg Pneumatischer Bremskraftverstärker für Kraftfahrzeuge
FR2727921A1 (fr) * 1994-12-09 1996-06-14 Alliedsignal Europ Services Servomoteur pneumatique d'assistance au freinage
DE19524503A1 (de) * 1995-07-05 1997-01-09 Lucas Ind Plc Bremskraftverstärker/Hauptzylinder-Einheit mit Verbindungsbolzen
FR2784641B1 (fr) 1998-10-20 2000-12-15 Bosch Syst Freinage Dispositif de freinage renforce fragilise au choc
DE102015212089A1 (de) 2015-06-29 2016-12-29 Continental Teves Ag & Co. Ohg Pneumatischer Bremskraftverstärker mit einem Verbindungsbolzen

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US2369797A (en) * 1942-05-04 1945-02-20 Trico Products Corp Window operator
US2987888A (en) * 1959-11-23 1961-06-13 Crowell Designs Inc Hydraulic master drive unit
US2997027A (en) * 1959-02-02 1961-08-22 Kelsey Hayes Co Motor mechanism having resilient reaction means
US3145628A (en) * 1962-08-03 1964-08-25 Cons Thermoplastics Company Shaft stabilizer
US3411409A (en) * 1966-03-05 1968-11-19 Alan Donald Bunyard Piston-rack operated shaft
US3537358A (en) * 1967-11-25 1970-11-03 Bunyard Alan D Rotary actuators
US3813992A (en) * 1972-03-29 1974-06-04 C Leroy Dual fluid pressure motor
DE2306630A1 (de) * 1973-02-10 1974-09-19 Alfred Schlieckmann Verdrehsicherung
US4256016A (en) * 1978-05-20 1981-03-17 Girling Limited Servo booster for vehicle braking systems
US4270353A (en) * 1977-10-20 1981-06-02 Girling Limited Servo boosters for vehicle brake systems
US4271750A (en) * 1978-07-08 1981-06-09 Lucas Industries Limited Servo boosters for vehicle braking systems

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
GB1214893A (en) * 1968-06-18 1970-12-09 Sp Kb Oboru Dlya Proizv Asbots Improvements in and relating to hydraulic motors
US3704986A (en) * 1970-12-09 1972-12-05 Res Eng Co Actuator
DE2308291C3 (de) * 1973-02-20 1979-04-05 Research Engineering Co., Houston, Tex. (V.St.A.) Stellantrieb mit Rfickschnellf ederung für Ventile u.dgl
FR2406551A1 (fr) * 1977-10-20 1979-05-18 Girling Ltd Amplificateur de servocommande pour systemes de freinage de vehicules
TR20168A (tr) * 1977-10-20 1980-09-29 Girling Ltd Tasitlarda kullanilan frenleme sistemlerine mahsus servofren

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2369797A (en) * 1942-05-04 1945-02-20 Trico Products Corp Window operator
US2997027A (en) * 1959-02-02 1961-08-22 Kelsey Hayes Co Motor mechanism having resilient reaction means
US2987888A (en) * 1959-11-23 1961-06-13 Crowell Designs Inc Hydraulic master drive unit
US3145628A (en) * 1962-08-03 1964-08-25 Cons Thermoplastics Company Shaft stabilizer
US3411409A (en) * 1966-03-05 1968-11-19 Alan Donald Bunyard Piston-rack operated shaft
US3537358A (en) * 1967-11-25 1970-11-03 Bunyard Alan D Rotary actuators
US3813992A (en) * 1972-03-29 1974-06-04 C Leroy Dual fluid pressure motor
DE2306630A1 (de) * 1973-02-10 1974-09-19 Alfred Schlieckmann Verdrehsicherung
US4270353A (en) * 1977-10-20 1981-06-02 Girling Limited Servo boosters for vehicle brake systems
US4256016A (en) * 1978-05-20 1981-03-17 Girling Limited Servo booster for vehicle braking systems
US4271750A (en) * 1978-07-08 1981-06-09 Lucas Industries Limited Servo boosters for vehicle braking systems

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428274A (en) 1980-09-10 1984-01-31 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4433614A (en) 1980-09-18 1984-02-28 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4416191A (en) * 1980-09-19 1983-11-22 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4557179A (en) * 1980-09-25 1985-12-10 Nissin Kogyo Kabushiki Kaisha Vacuum booster device
US4594854A (en) * 1980-12-06 1986-06-17 Nissin Kogyo Kabushiki Kaisha Assembly of vacuum booster and master cylinder
US4467705A (en) * 1981-02-10 1984-08-28 Feramatic Ag Fluid-actuated drive
US4522031A (en) * 1981-06-17 1985-06-11 The Bendix Corporation Fluid pressurizing device
US4630525A (en) * 1984-03-29 1986-12-23 Aisin Seiki Kabushiki Kaisha Vacuum booster assembly
US5052274A (en) * 1987-12-01 1991-10-01 Bendix France Tandem brake booster with return spring arrangement for rear piston chamber
US5072996A (en) * 1988-08-19 1991-12-17 Lucas Industries Public Limited Company Brake actuating assembly for motor vehicles
JP3215704B2 (ja) 1992-01-31 2001-10-09 ルーカス・インダストリーズ・パブリック・リミテッド・カンパニー モータビークルブレーキ用アクチュエータユニット
US5570622A (en) * 1995-06-08 1996-11-05 General Motors Corporation Power booster with guided power piston
US5878650A (en) * 1997-05-21 1999-03-09 General Motors Corporation Power booster sealing mechanism
DE19832357A1 (de) * 1998-07-20 2000-01-27 Continental Teves Ag & Co Ohg Pneumatischer Kraftverstärker in Tandembauweise
US6189437B1 (en) * 1999-08-30 2001-02-20 Robert Bosch Corporation Brake booster having means for mounting on a wall
US20070137473A1 (en) * 2003-08-20 2007-06-21 Continental Teves Ag & Co. Ohg Actuation unit for a hydraulic vehicle brake
US7040217B1 (en) * 2004-11-16 2006-05-09 Robert Bosch Gmbh Tie rod for a brake booster
US20070089601A1 (en) * 2005-10-25 2007-04-26 Sexton Roger S Brake booster with deformationally sealed passage and method of manufacture
US7331275B2 (en) 2005-10-25 2008-02-19 Delphi Technologies, Inc. Brake booster with deformationally sealed passage and method of manufacture
US20190047531A1 (en) * 2015-09-14 2019-02-14 Robert Bosch Gmbh Electromechanical brake booster and braking system
US10549741B2 (en) * 2015-09-14 2020-02-04 Robert Bosch Gmbh Electromechanical brake booster and braking system
CN110366511A (zh) * 2017-03-06 2019-10-22 罗伯特·博世有限公司 机电的制动力放大器以及用于机电的制动力放大器的制造方法
CN110366511B (zh) * 2017-03-06 2022-06-21 罗伯特·博世有限公司 机电的制动力放大器以及用于机电的制动力放大器的制造方法

Also Published As

Publication number Publication date
DE2830262A1 (de) 1980-01-24
ES244436Y (es) 1980-12-16
GB2025549A (en) 1980-01-23
ES244436U (es) 1979-12-16
JPS6026746B2 (ja) 1985-06-25
GB2025549B (en) 1982-09-02
SE7905907L (sv) 1980-01-11
BR7904297A (pt) 1980-04-15
FR2430879A1 (fr) 1980-02-08
JPS5511990A (en) 1980-01-28
IT7924215A0 (it) 1979-07-10
SE442106B (sv) 1985-12-02
FR2430879B1 (enrdf_load_stackoverflow) 1984-12-28
DE2830262C2 (enrdf_load_stackoverflow) 1988-07-28
IT1165147B (it) 1987-04-22
ZA793157B (en) 1980-07-30

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